addusbhardware DEVS:USBHwarde/denebz2.device
I'm assuming that "Hwarde" is a typo.

That command should be all you need from the USB side. By default, the CD drive will automount using L:AmiCDFS. If you don't have AmiCDFS, then automount won't work until you reconfigure it in Trident.
But you can of course mount your CD drive manually, just as if you had plugged it into a SCSI or IDE port. the device name is usbscsi.device, and the unit is probably 0.